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Base Model:
SASW-S [for Structural Testing]
click here for enlarged view [+]
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Scroll down to see a list of Available
Models and Key
Features for the SASW test method add-on.
Save money! Contact Olson Instruments when adding on to an existing system,
or purchasing multiple systems as some of the components are common to other
test methods.
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Spectral Analysis of Surface Waves (SASW) investigations are typically
applied to assess material stiffness and condition, and layer thickness.
The Spectral Analysis of Surface Waves (SASW-S) system is designed
for the following applications:
- Determination of pavement system profiles including the surface layer, base and subgrade materials
- Determination of abutment depths of bridges
- Condition assessment of concrete liners in tunnels, slabs, and other structural concrete members
- Evaluation of alkali-silica, fire, fire, freeze-thaw and other cracking damage
- Velocity vs. strength correlation with cores
The SASW method uses the dispersive characteristics
of surface (Rayleigh) waves to determine the variation of the shear
wave velocity (stiffness) of layered systems with depth. The SASW testing
is applied from the surface making it both nondestructive and non-intrusive.
Once the shear wave velocity profiles are determined, shear and Young’s
moduli of the materials can be calculated through the use of elastic
wave threory equations. Shear wave velocity profiles can be determined
from experimental dispersion curves (surface wave velocity versus wavelength)
and compared to actual SASW measurements through a process called forward
modeling or through an inversion process. This allows the user to find
the best thickness and stiffness model for the layered system of interest.
The SASW method can be performed on any material provided there
is an accessible surface for receiver attachments. SASW is also
used for geophysical purposes in estimating shear wave velocity
of soils and rock — click here to go to the SASW-G method.
Training
Hands-on training classes are available for all of our Nondestructive Testing
Methods at our Wheat Ridge, Colorado (USA) location, which is a
suburb located appromately 15 minutes northwest of downtown Denver. Training
may be available at your location by one of our agents upon special arrangement.
For complete details about the Spectral Analysis of Surface Wave-S system available
as an add-on test for the Freedom
Data PC or NDE 360 platform, call toll free
1-888-423-1214 or email:
details@olsoninstruments.com
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Applicable On:
- Asphalt
- Concrete
- Masonry
- Stone
- Wood
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Test For:
- Layer Thickness
- Material Moduli
- Shear Wave
Velocity Profiles
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Meets ASTM:
Meets ACI:
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All of Olson Instruments have been researched, tested, and used on-site daily
by our sister company, Olson
Engineering, world reknowned for NDT consulting. The OE
Website is loaded with Tech Brief and project photos using the
equipment shown on this website. Purchase our products to “do-it-yourself”,
or hire an Olson Engineering Nondestructive Testing professional for your
next project
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